Precision Twist Drill 6000120 Cobalt Drill Bit No 9

Product Description

The PRECISION TWIST DRILL 6000120 is a cobalt jobber-length drill bit designed for production drilling in tough materials. Built to NAS 907 standards, it carries a No. 9 wire gauge size with a decimal diameter of 0.1960 inches and a 135-degree split point for self-centering starts with minimal walking. The web-thinned, tapered-web construction reduces thrust and improves chip evacuation. An oxide bronze finish provides light lubricity and corrosion resistance during cutting operations. This bit is sized for right-hand spiral fluting and is sold individually, though ordering in multiples of 12 is required per supplier terms.

This drill bit is suited for use in metalworking applications across a range of materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. It is a general-purpose jobber-length bit commonly used by machinists, maintenance technicians, and sheet metal workers in both shop and field settings. The straight cylindrical shank fits standard drill chucks. At 3.625 inches overall length with a 1.1875-inch flute length and a maximum drilling depth of 1.1875 inches, it handles typical through-hole and blind-hole drilling tasks in moderate material thickness.

Key Features

• No. 9 wire size, 0.1960-inch diameter for precise hole sizing in metalwork
• 135-degree split point reduces walking and lowers required feed pressure
• Cobalt high-speed steel construction for heat resistance in hard and abrasive materials
• Web-thinned tapered web improves chip clearance and reduces cutting torque
• Oxide bronze finish adds light lubricity and surface protection
• Meets NAS 907 specification for consistent dimensional accuracy

Compatibility

Designed as an OEM-specification jobber-length drill bit for use in standard drill chucks accepting a 0.1960-inch straight cylindrical shank. Compatible with primary workpiece material codes P, M, K, N, and S covering steel, stainless steel, cast iron, non-ferrous metal, superalloys, and titanium applications. Part of the PRECISION TWIST DRILL Series R88CO-R89CO family.

Installation Notes

Installation is performed by machinists and maintenance technicians using standard drill presses, hand drills, or CNC equipment with an appropriately sized chuck. Secure the shank fully in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or coolant for the workpiece material to manage heat buildup, particularly when drilling stainless steel, superalloys, or titanium. Inspect the cutting edge for wear or chipping before each use and replace if the point geometry is compromised.